Valve structure for pumps.



0. W. JOHNSON. VALVE STRUCTURE FOR PUMPS. APPLICATION FILED DEC. s, 1913.

1,109,126. Patented Sept 1, 1914 "1 a 4%? [mm a 1M ,.J a1! L3 THE :uARIS PETERS CDH'PHO'IOJJTHOU WASHINGTON n UNITED STATES PATENT OFFICE.

OSCAR W. JOHNSON, OF ROCKFORD, ILLINOIS ,ASSIG-NOR TO WARD PUMP COMPANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

VALVE STRUCTURE ,FOR PUMPS.

To all whom it may concern:

Be it known that I, OSCAR W. JoHNsoN, a citizen of the United States, residing at Rockford, in the county of Winnebago and the State of Illinois, have invented certain new and useful Improvements in Valve Structures for Pumps, of which the follow? ing is a specification.

This invention relates to valve-structure for pumps where removable valve seats are used; and has for its object the provision of improved means for holding a removable valve seat in operative position.

It is the practice in pump structure to provide valves seated upon and carried by removable members, the object of this being to allow the valve and its seat member to be removed together, this being favorable as a manufacturing feature and also as a means for easily cleaning and repairing the above parts.

In my improvements the means for holding the valve seat-member in position is itself held in position by a cap overlying the opening through which the valve and seatmember is adapted to be placed in the pump structure; and since the seat-member must be maintained fixed, said cap must be attached fixedly in position. To make a tight joint in the cap fitting, a gasket is used; and in practice, variations in cap fittings and in the thickness of gaskets result in a corresponding variation being necessary in the means for holding the seat-member in position, otherwise such variation would result in either a loose cap fitting or in the seatmember being loosely mounted. This necessary variation in distances between the cap and seat-member I provide for by allowing a compensating movement between said members, which in the present case is in the peculiar structure of the means for holding the seat-member in position, this means having a certain resiliency to compensate for the variation in distances above described; and this seat holding means serves also as a means for guiding the valve.

In the accompanying drawings: Figure 1 is a vertical sectional view through a pump discharge valve-passage, embodying my improvements, and is taken on the line 1--1 of Fig. 2. Fig. 2 is a plan View of a portion of a pump such as embodies my improvements. Fig. 3 is a plan sectional view as taken on Specification of Letters, Patent.

Application filed December 6, 1913.

Patented Sept. 1, 1914.

Serial No. 805,077.

the line 33 of Fig.1. Fig. 4 is a detail vlew 1n perspective of a valve seat-member. A pump chamber 5 has a discharge open mg 6 from which extends upwardly a circular casing 7 open at its top, forming a passage 8. A lateral passage 9 leads from passage 8 and is inclosed by the wall 10, the lower wall of passage 9 being continued into passage 8 and formed with a central opening 11 therethrough. A valve seat-ring 12 is located in passage 8, mounted upon them; nular rib formed around opening 11. Said ring is formed on each flat side with a tapered valve seat 13 the outer edges of which are inset from the peripheral edge of the ring to allow fiat faces 14. A valve 15 is mounted upon the upper seat 18 of the seatring and is provided with a raised head 16. The seat-ring is held fixed in position by a member mounted thereon and being held fixed by the attaching of a cap 17 to cover the top of passage 8. This cap is provided with extendedends through which bolts 18 connect with ears 19 extending from casing 7 and a gasket 20 is provided for the mounting of the cap to furnish a tight joint. The seatring holding member which is located intermediate the cap and seat-ring is provided with a central raised head 22 which is received in a recess 23 in the bottomofr cap 17; and said member 21 is formed with three spirally and downwardly extending legs 24,

the end of which have insets 25 adapted to engage the outer top peripheral edge of the ring 12. This member 21 although substantially rigid, is formed of a metal having a certain resiliency so that a movement of legs 24 will be allowable under pressure, relative to its main body. By this valve structure the seat-ring is held fixed in position by the member 21, which in turn is maintained in position by the cap 17 bolted to the pump casing. It will be observed that it is necessary to maintain the seat-ring fixed in position at all times during operation, and that if member 21 were a rigid member entirely, with a gasket at the cap joint said member would cause a loose cap joint when a thin gasket is used by not allowing the cap to be pulled down tight, and if the gasket were too thick the member 21 would be loose. Therefore by providing the member 21 with legs that are capable of the required resiliency the cap may be pulled down a certain distance to make a tight oint even after striking the said member. It will also be observed since the legs are inclined at an angle to the valve axis and are located in a plane common to the seat-ring periphery, that any relative movement thereof will cause their ends to move in a general direction with the ring periphery, thereby maintaining a fixed relation with the ring at all times. The member 21 also acts, through its said legs, as a guide to the valve during the raising action thereof, and also as a stop for limiting said raising movement by the head 16 of the valve abutting the under side of the said member. VVit-h the removal of the cap 17 the seat-ring, valve and ring holding member may all be removed and the ring reversed or the parts cleaned if it is necessary; and it will be noted that with the exception of the fastening means for the cap, no adjustable or' manually movable parts are required to place and maintain the valve and seat-ring in operative position.

I claim as my invention 1. In a valve structure, the combination of a removable valve seat member and a valve therefor, and means for holding the valve seat member in position including a member having resilient spirally disposed legs.

2. In a valve structure, the combination of a removable valve containing member and a valve therefor, and means for holding the valve member in position including members obliquely disposed relative to the valve axis for allowing a given movement in the direction of said valve axis.

3. The combination of a valve member adapted to be held operatively in a fixed position, and means for holding said member in said fixed position comprising a substantially rigid member having a portion thereof formed of a material such as will give a certain resiliency to said portion when pressure is applied thereto to a certain extent.

et. The combination of a casing having a passage with an open end, a valve member located within the passage and having a valve associated therewith, a cap covering said open end of the passage and being mounted on a gasket, fastening means for movingand holding the cap in a tight joint position, and means associated with the cap for engaging and holding the said valve member in an operative position, saidmeans being yieldable during a portion of the movement of said cap to its tight joint position to compensate for variations in the thickness of said gasket.

5. In a valve structure, the combination of a removable valve seatmember and a valve therefor, and means for holding the valve seat member in position, said means having metallic leg-members of such construction as to hold the valve seat fixedly in position and to give a certain resiliency to permit said means to yield in a compensating movement.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

OSCAR W. JOHNSON.

Witnesses:

J OHN- F. MOGANNA, J12, E. D. E N. BEHET.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

It is hereby certified that in Letters Patent No. 1,109,126, granted September 1914, upon the application of Oscar W. Johnson, of Rockford, Illinois, for an improvement in Valve Structures for Pumps, an error appears in the printed specification requiring correction as follows: Page 2, line 87, for the word given,

read give, and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the casein the Patent Oflice.

Signed and sealed this 22nd day of September, A. D., 1914:.

R. F. WHITEHEAD,

Acting Commissioner of Patents.

[SEAL] 

